Advanced Concepts of Node classifier API v1

Nodes Check-in History endpoints

To access records about nodes which have checked into the node classifier, use the "nodes" endpoints.

GET /v1/nodes

Fetch the check-in history for all the nodes that have used the node classifier to check-in.

GET /v1/nodes/<node>

Fetch the check-in history for a particular node.

Enable check-in storage to use this endpoint

Since it creates undue load on larger deployments, node check-in storage stays deactivated by default. To access the information from the "nodes" endpoints, we must enable node check-in storage. The "nodes" endpoints return empty arrays if node check-in storage is disabled.

Set the classifier node check-in storage parameter in the puppet enterprise::profile::console class to true to enable node check-in storage.

Group Children endpoint

To get a list of node groups coming down from a single node group, use the group-children endpoint.

GET /v1/group-children/<id>

Fetch a list of node groups that are coming down from a particular node group.

Rules endpoint

For translating a node group rule condition to PuppetDB query syntax, use the rules endpoint.

POST /v1/rules/translate

Transform the condition of a node group rule into PuppetDB query syntax.

Import Hierarchy endpoint

Using the import hierarchy endpoint, we can delete all existing node groups. Their deletion will be from the node classifier service. Then we can replace them with the node groups specified in the request body.

POST /v1/import-hierarchy

Delete all current node groups from the node classifier service and substitute them with the node groups given in the body of the submitted request.

Last Class Update endpoint

To find out when classes were updated from the primary server the last time, use the last-class-update endpoint.

Use the Update classes endpoint to instruct the node classifier. This is to get back the updated class and environment definitions from the primary server.

GET /v1/last-class-update

Fetch the last time classes were updated from the primary or main server.

Frequently Asked Questions

What type of tool is Puppet?

Puppet is a software configuration management solution with its own declarative language for describing system configuration. It is a model-driven solution that may be used with simple programming skills.

What are puppet modules?

Puppet modules are made up of manifests and data that can comprise facts, files, and templates. Modules help us manage and reuse Puppet code by allowing us to divide it into many manifests. This is with the exception of the primary location.

What makes Puppet different from Terraform?

'Terraform Apply' is designed to resolve any abnormalities with efficiency. Configuration management tools, on the other hand, do not reset a system. Instead, they fix a problem on the spot. Puppet is a software installation and management tool for servers.

Conclusion

In the article, we found out about the advanced concepts of Node Classifier API v1. We got to know what the different advanced endpoints do. Refer to our courses and explore Coding Ninjas Studio to find more exciting stuff. You can also look into the interview experiences and solve different problems. Look into our Guided paths, test series, libraries and resources to know more.

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